1. Department of Pediatrics, Petz Aladár County Teaching Hospital, Győr, Hungary.
2. Department of Isotopic Diagnostics, Petz Aladár County Teaching Hospital, Győr, Hungary.
3. Department of Pharmaceutical Technology, University of Debrecen, Debrecen, Hungary.
4. Department of Pediatrics, University of Szeged, Szeged, Hungary.